Work reciprocating mechanism for tape honing machines and the like



Oct. 9, 1962 T. H. SLOAN 3,057,123

WORK RECIPROCATING MECHANISM FOR TAPE HONING MACHINES AND THE LIKE FiledAug. 19, 1960 2 Sheets-Sheet l IN VEN TOR.

BY Wm 4M Oct. 9, 1962 T. H. SLOAN WORK RECIPROCATING MECHANISM FOR TAPEHONING MACHINES AND THE LIKE Filed Aug. 19, 1960 2 Sheets-Sheet 2 BY 7%AW W27 United States Patent 3,057,123 WORK RECIPROCATING' MECHANISM FORTAPE HQNING MACHINES AND THE LIKE Theodore H. Sloan, Charleroi, Pa.,assignor of one-quarter to William B. Jasper-t, Upper St. Clair, Pa.Filed Aug. 19, 1960, Ser. No. 50,630 4 Claims. (Cl. 51151) Thisinvention relates to new and useful improvements in apparatus for honingcircular bodies by abrasive tape and it is among the objects thereof toprovide apparatus for rotatably supporting the objects to be honed in amanner to be movable on their supports in contact with an abrasive tape,the cylindrical bodies being movable along their own axis across theface of the tape while the latter is moving tangentially to the surfaceof the cylindrical body. In a co-pending application serially numbered854,740, filed November 23, 1959, now Patent No. 3,021,- 648, grantedFebruary 20, 1962, I have disclosed a method of honing cylindricalbodies by abrasive tape in which the bodies are fed to a pair of pinchrolls that act as a support while revolving said bodies in contact withthe abrasive surface of the tape, the tape being mounted on a honingshoe that is subjected to reciprocal motion to move the tape across theface of the rotating cylindrical object being honed.

In accordance with the present invention, the honing tape which may befed in the same manner as in my former application to apply an abrasivesurface to the cylindrical body being honed, is not subjected toreciprocatory motion but is held stationary while the object being honedis subjected to reciprocatory motion while rotating on its support.

The invention will become more apparent from a con sideration of theaccompanying drawings constituting a part hereof in which like referencecharacters designate like parts and in which:

FIGURE 1 is a plan view of a portion of a honing machine embodying theprinciples of this invention;

FIGURE 2, a side elevational view, partially in section, taken along theline 22 of FIGURE 1;

FIGURE 3, an end elevational view taken along the line 33 of FIGURE 2;and,

FIGURE 4 is a cross-sectional view through the pinch rolls and a rollerbeing honed showing a modification of the roller reciprocating means.

With reference to FIGURES l to 3 of the drawing, the numeral 1designates a portion of a base having a plurality of bearing lugs 2,FIGURE 2, of which there are four for journaling pins 3 and 4, FIGURE 3,the pins 3 and 4 being secured in the bearing lugs by set screws 5.Pivoted on the pins 3 and 4 are bracket 6, which is in the nature of abell crank having an arm 7, and a bracket 8 having an arm 9. The arm 9is provided with a slot 10, FIGURE 1, for embracing a bolt 11 having athreaded body portion for receiving nuts 12 and 13 which are adjustableto fix the position of the arm 9, thereby fixing the position of the arm8 of the bell crank lever. The arms 6 and 8 carry shafts 14 and 15,FIGURE 3, on which are mounted pinch rolls 16 and 17, respectively. Theother end of shafts 14 and 15 are provided with sheave wheels 18 and 19adapted to be connected by a belt with a sheave whel 20 mounted on ashaft 21 having a sheave Wheel 22 driven by belt 23 connected to a drivemotor, not shown. The bell crank lever 6 has an arm 25 integrally joinedor mounted on the shaft 3 in the manner to rock the arm 6 when subjectedto angular movement. The end of the arm 25 is provided with a roller 26which is a cam follower that engages the cam 27 mounted on shaft 28having sheave wheel 29 driven by belt 30 so that when the peak 31 of thecam 27 strikes the roller 26 it will displace the arm 6 and remove thepinch roller 16 out of contact with the conical roller 32, which is theobject being honed, allowing the latter to fall from its support, whichis an anvil 33, into a receiving hopper or chute, not shown. Thebrackets 6 and 8 are joined by a tension spring 34 which yieldinglyholds the pinch rolls in engagement with the work or roller 32, butwhich allows the pinch rolls to be separated by action of the cam 27 asit strikes roller 26. A set screw 34 constitutes a stop for the arm 7and the set screw is adjustable to maintain the pinch roll 16 in properengaging position for different size conical rolls 32 that are beinghoned.

The sheave wheels 18 and 19 are driven by a drive belt 35, tension ofwhich is maintained by a coil spring 36 attached to the base 1 and to anarm 37 pivoted at 38 on a lug 39 attached to the bottom of the base 1.The extended end of lever 37 has a bearing that holds the pin 21 onwhich the sheave wheels 20 and 22 are mounted. The pull on spring 36causes lever 37 to exert tension to maintain the belt 35 taut to drivethe pinch or drive rolls 16 or 17 in the manner shown in FIG- URE 3.

With reference to FIGURES 1 and 2, the numeral 40 designates a set screwthat constitutes an adjustable stop with a lock nut 41 against which thetaper rollers 32 to be honed abut during the honing operation. As shownin FIGURE 2, the set screw 40 is mounted in a bracket 42 carried by apin 43 that extends through a vertical support 44 extending on the base1, a guide pin 45 being provided to maintain alignment of the set screw40 with the taper roller 32.

Bracket 42 is pivotally mounted at 46 to a crank 47 mounted on a crankshaft 48 driven by sheave wheel 49 and a belt 50. The crank shaft 48 ismounted in a bearing 51 having a flanged base 52 resting on machine base1.

The taper rollers 32 are fed from a chute to their support 33 bymechanism shown and described in my copending application seriallynumbered 854,740 filed November 23, 1959, and the tapered faces of theroller 32 and the drive rolls or pinch rolls 16 and 17 cause the taperroller 32 to move along its axis as shown by the arrow in FIGURE 1. Thismovement takes place when the crank arm 47 retracts the set screw 40.However, at the end of the crank movement, the set screw 40 again pushesthe taper roller 32 axially in the direction of the conical face of thepinch roll to the position shown in FIGURE 1 and in doing so thesurfaces to be honed are moved transversely across the face of a honingtape 52, FIGURE 3, that passes around a stationary shoe 53, the tapebeing fed to the rounded end 54 of the shoe in the manner shown anddescribed in my aforesaid copending application. In place of the fixedanvil 33 that supports the taper rollers 32, a renewable support of aflexible tape material may be employed as disclosed in my aforesaidco-pending application, now Patent No. 3,021,648.

By means of the above-described apparatus, the roller to be honed ismoved along its axis with its surface contacting the abrasive of thehoning tape to produce the desired honed finish on the surface thereof.By virtue of the movement of crank 47, the roller 32 is oscillated backand forth between the drive rolls 16 and 17 until the honing has beencompleted, at which time cam 27 contacts lever 25 and separates thedrive wheel 16 from the roller 32 allowing the latter to drop from theanvil 33 and a new roller to be fed between the pinch rollers.

In the modification shown in FIGURE 4 of the drawing, a cylindricalroller 55, instead of a conical roller 32, is mounted between a pair ofcylindrical drive rolls 56 and 57 and a pair of adjustable stops in theform of set screws 58 and 59 maintain the positions of the cylindricalroller 55 between the drive rolls 56 and 57. The set screws 53 and 59are mounted in arms 6i) and 61 and are adjustable by lock nuts 62 and63. The arms 60 and 61 are mounted in a guide pin 64 slidable in abracket 57, a guide pin 65 maintaining alignment of the stops 58 and 59with the end of the cylindrical roller 55. The pin 64 is connected to -acrank and operated in the same manner as the reciprocal guide of FIGURE2 of the drawing. In the absence of the tapered face, the rolls 58 mustbe fed in both directions, since there is no squeez ing action todisplace the roll as in the case of the taper rolls 9, FIGURES l to 3 ofthe drawings.

Although several embodiments of the invention have been hereinillustrated and described, it will be evident to those skilled in theart that various modifications may be made in the details ofconstruction without departing from the principles herein set forth.

I claim:

1. Apparatus for honing circular bodies comprising a pair of pinch rollsfor engaging the body therebetween to rotate the same at suitable honingspeeds, an abrasive material mounted to engage said circular body on anexposed surface thereof between said pinch rolls, a bottom support forsaid circular body and means for subjecting said circular body toreciprocatory movement along its axis while maintaining contact with theabrasive-surface.

2. Apparatus as set forth in claim 1 in which the pinch rolls haveconical engaging surfaces for engaging conical shaped rollers and inwhich the rollers are supported against the pressure of the abrasivematerial acting thereon and are provided with a stop for engaging theend of the roller, said stop being movable in an axial direction tosubject the roller to axial movement While in contact with the abrasivematerial.

3. Apparatus as set forth in claim 1 in which the pinch rolls aremounted on bell cranks pivoted to a base and a roller support extendsvertically from the base in between said pinch rolls, a honing shoedisposed above said rollers in alignment with said vertically extendingsupport, means for adjusting the bell crank of one of said pinch rollsin accordance with the diameter of the taper roller which said pinchroll engages and means for rocking the other of said bell cranks todisplace the pinch roll mounted thereon sufficiently to permit the taperroller to discharge from its support.

4. Apparatus as set forth in the next preceding claim in which the pinchrolls or driven to subject the taper roller to proper honing speeds andin which means are provided to drive the bell crank independently of thepinch roll drive means.

References Cited in the file of this patent UNITED STATES PATENTS2,450,237 Indge Sept. 28, 1948

